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Record of Decision System (RODS)

SANGAMO ELECTRIC DUMP/CRAB ORCHARD NATIONAL WILDLIFE REFUGE (USDOI)

Abstract

Site Name:  SANGAMO ELECTRIC DUMP/CRAB ORCHARD NATIONAL WILDLIFE REFUGE (USDOI)
Address:  EAST OF STATE ROUTE 148 
City & State:  CARTERVILLE  IL  62959
County:  WILLIAMSON
 
EPA ID:  IL8143609487
EPA Region:  05
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R05-90/163
ROD Date:  03/30/1990
Operable Unit(s):  01
 
Media:  SOIL SEDIMENT DEBRIS SLUDGE
 
Contaminant:  METALS, CADMIUM, CHROMIUM, LEAD
 
Abstract:  THE US DOI SANGAMO CRAB ORCHARD NWR SITE IS WITHIN THE CRAB ORCHARD NATIONAL WILDLIFE REFUGE, LOCATED NEAR CARTERVILLE, ILLINOIS. WITHIN THE 43,000-ACRE REFUGE, LAKES AND ADJACENT WETLANDS SUPPORT RECREATIONAL ACTIVITIES ON THE WESTERN PORTION OF THE REFUGE, WHILE THE EASTERN PORTION IS USED FOR MANUFACTURING FACILITIES. SITE FEATURES IN THE EASTERN PORTION INCLUDE A PLATING POND, A DRAINAGE POOL, AND AN INDUSTRIAL LANDFILL. THE DEPARTMENT OF DEFENSE (DOD), THE ORIGINAL ADMINISTRATOR OF THE REFUGE, LEASED PORTIONS TO MUNITIONS AND EXPLOSIVES MANUFACTURERS WHO CONTINUE TO OPERATE ONSITE. IN 1947, DOD TRANSFERRED THE ADMINISTRATION OF THE REFUGE TO THE DEPARTMENT OF THE INTERIOR (DOI). DOI LEASED PORTIONS OF THE REFUGE TO MANUFACTURERS OF PCB-CONTAINING TRANSFORMERS AND CAPACITORS, AUTOMOBILE PARTS, FIBERGLASS BOATS, PLATED METAL PARTS, AND JET ENGINE STARTERS. SOLID WASTES GENERATED FROM THESE INDUSTRIAL ACTIVITIES WERE DISPOSED OF IN ONSITE LANDFILLS, WHILE OTHER LIQUID WASTES MAY HAVE BEEN DISCHARGED INTO NEARBY SURFACE WATERS AND IMPOUNDMENTS. EPA HAS DIVIDED THE SITE INTO FOUR OPERABLE UNITS (OUS) FOR REMEDIATION. THIS ROD ADDRESSES OU1, AND FOCUSES ON THE METAL-CONTAMINATED SOIL, SEDIMENT, DEBRIS, AND SLUDGE IN THREE AREAS OF THE SITE. THESE AREAS ARE; THE AREA 7 PLATING POND (SITE 15), WHICH IS AN INACTIVE 45,000 GALLON POND CONTAINING APPROXIMATELY 280 CUBIC YARDS OF CONTAMINATED MATERIAL; THE OLD REFUGE SHOP DRAINAGE POOL AND INTERMITTENT CREEK (SITE 22), WHICH IS A COLLECTION POINT FOR RUN-OFF, AND CONTAINS APPROXIMATELY 5,200 CUBIC YARDS OF CONTAMINATED MATERIAL; AND THE FIRE STATION LANDFILL (SITE 29), A 350 BY 300 OPEN FIELD CONTAINING APPROXIMATELY 14,600 CUBIC YARDS OF CONTAMINATED MATERIAL. AT LEAST THREE OTHER OUS WILL BE ADDRESSED BY FUTURE RODS, DEPENDING ON SITE INFORMATION COLLECTED IN THE FUTURE. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING THE SOIL, SEDIMENT, DEBRIS, AND SLUDGE ARE METALS INCLUDING CADMIUM, CHROMIUM, AND LEAD.

THE SELECTED REMEDIAL ACTION FOR THIS SITE INCLUDES EXCAVATING OVER 20,000 CUBIC YARDS OF CONTAMINATED SOIL, SEDIMENT, DEBRIS, AND SLUDGE, AND TEMPORARILY STORING THE WASTE ONSITE UNTIL TREATMENT OR DISPOSAL; TREATING APPROXIMATELY 9,000 CUBIC YARDS OF SOIL, DEBRIS, AND SEDIMENT CONSIDERED TO BE RCRA CHARACTERISTIC HAZARDOUS WASTE USING STABILIZATION AND FIXATION; DISPOSING OF THE TREATED AND NON-TREATED SOIL, DEBRIS, AND SLUDGE ONSITE IN AN INDUSTRIAL (RCRA SUBTITLE D) LANDFILL; CAPPING THE LANDFILL; FILLING THE EXCAVATED AREAS WITH CLEAN SOIL; CONDUCTING ENVIRONMENTAL MONITORING OF GROUND WATER, SURFACE WATER, AND LEACHATE, AND LONG-TERM MAINTENANCE OF THE LANDFILL; AND IMPLEMENTING INSTITUTIONAL CONTROLS, AND CONTINUING SITE ACCESS RESTRICTIONS. THE ESTIMATED PRESENT WORTH COST FOR THIS REMEDIAL ACTION IS $2,700,858, WHICH INCLUDES AN ANNUAL O&M COST OF $54,371 FOR 30 YEARS.

PERFORMANCE STANDARDS OR GOALS; CLEANUP GOALS FOR SOIL, SEDIMENT, DEBRIS, AND SLUDGE ARE BASED ON THE RISK ASSESSMENT, A (10-6) EXCESS CANCER RISK LEVEL, AND A HI LESS THAN 1. CHEMICAL-SPECIFIC GOALS INCLUDE CADMIUM 10 MG/KG, AND LEAD 450 MG/KG. AT THE AREA 7 PLATING POND, ALL SLUDGE, SOIL, AND SEDIMENT CONTAMINATED WITH CHROMIUM GREATER THAN BACKGROUND WILL BE REMOVED. INSTITUTIONAL CONTROLS; INSTITUTIONAL CONTROLS WILL BE MAINTAINED TO RESTRICT ACCESS AND PROTECT WILDLIFE AT THE REFUGE.
 
Remedy:  THIS OPERABLE UNIT IS THE FIRST OF SEVERAL PLANNED FOR THE SITE. THE REMEDY FOR THE FIRST OPERABLE UNIT ADDRESSES THREE DISTINCT SITES WHICH CONTAIN SOIL AND SEDIMENT CONTAMINATED PRIMARILY WITH METALS SUCH AS CADMIUM, CHROMIUM AND LEAD. A PREFERRED ALTERNATIVE WAS SELECTED BY US EPA FOR A SECOND OPERABLE UNIT, CONSISTING OF FOUR DISTINCT SITES PRIMARILY CONTAMINATED WITH PCBS AND LEAD. PUBLIC COMMENT IS CURRENTLY BEING EVALUATED ON THE SECOND OPERABLE UNIT, AND THE FINAL REMEDY WILL BE SELECTED AFTER THE COMMENTS ARE REVIEWED. THE REMEDY SELECTED FOR THE METALS AREAS OPERABLE UNIT ADDRESSES THE PRINCIPLE THREATS POSED BY THE SITES COMPRISING THE OPERABLE UNIT.

THE MAJOR COMPONENTS OF THE SELECTED REMEDY INCLUDE;

* EXCAVATION OF CONTAMINATED SOIL AND SEDIMENT;
* TREATMENT BY STABILIZATION/FIXATION OF ALL EXCAVATED SOIL AND SEDIMENT CONTAMINATED WITH METALS THAT ARE CONSIDERED RCRA HAZARDOUS BECAUSE OF EP TOXICITY TO RENDER THEM NON-HAZARDOUS;
* ON-SITE DISPOSAL OF NON-RCRA HAZARDOUS STABILIZED/FIXED MATERIAL AND UNTREATED RESIDUES EXCEEDING THE CLEAN UP TARGETS IN A LANDFILL MEETING THE REQUIREMENTS OF RCRA SUBTITLE D AND 35 ILLINOIS ADMINISTRATIVE CODE PART 807;
* ENVIRONMENTAL MONITORING DURING AND AFTER REMEDIAL CONSTRUCTION ENSURE THE EFFECTIVENESS OF THE REMEDIAL ACTION.
 
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